Seems likely you have an infection. Infections can create high insulin resistance. I’ve been through infections, both viral and bacterial, when I needed twice or more the total daily dose of insulin and even that didn’t bring my levels down into my normal range.
I would make sure that you get plenty of water and sleep. Limiting simple carbohydrates like bread and cereal can help to keep you glucose lower. You might consider eating fewer meals and establishing some longer periods between meals. That can give your body some time between digestion demands and free up resources to recover and heal.
Checking blood glucose levels more frequently can help guide your actions. Writing down your glucose numbers can also help.
If this high blood glucose episode is caused by an infection, your control will return as the infection recedes. You will need to back off on the higher insulin doses as it does but I’ve found that the higher insulin needs do not subside quickly. If you’re watching with regular fingersticks, you’ll know when to start re-establishing more normal insulin doses.
If you do have an infection driving high BGs, water and sleep are your two biggest allies. Concentrate on them. Good luck and get better!
Please update as the days go by.